usbloadergx/source/libwiigui/gui_circle.cpp

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/****************************************************************************
* Copyright (C) 2010
* by Dimok
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any
* damages arising from the use of this software.
*
* Permission is granted to anyone to use this software for any
* purpose, including commercial applications, and to alter it and
* redistribute it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you
* must not claim that you wrote the original software. If you use
* this software in a product, an acknowledgment in the product
* documentation would be appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and
* must not be misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source
* distribution.
***************************************************************************/
#include "gui_circle.hpp"
GuiCircle::GuiCircle()
: radius(100.0f), filled(true), accuracy(36)
{
color = (GXColor) {0, 0, 0, 255};
}
GuiCircle::GuiCircle(float r)
: radius(r), filled(true), accuracy(36)
{
color = (GXColor) {0, 0, 0, 255};
}
void GuiCircle::Draw()
{
int loopAmount = filled ? accuracy : accuracy+1;
GX_Begin(filled ? GX_TRIANGLEFAN : GX_LINESTRIP, GX_VTXFMT0, loopAmount);
for(int i = 0; i < loopAmount; ++i)
{
f32 rad = (f32) i / (f32) accuracy * 360.0f;
f32 x = cos(DegToRad(rad)) * radius + GetLeft();
f32 y = sin(DegToRad(rad)) * radius + GetTop();
GX_Position3f32(x, y, 0.0f);
GX_Color4u8(color.r, color.g, color.b, color.a);
}
GX_End();
}